Akte pietes schat



- d vits are made Parser EMQEQ ANE METER SCIL-IAT, or U'rnnon'r, NETHERLANDS.

AUTOMATIC DAVIT;

of the type in-which the axes of rotation are inclined outwardly toward the sh ps side sothat they have a permanent tendency to swing automatically by gravity to their low-J ermost position over the water.

In order that davits ot this type may swing outwardly automatically even 't'rom the high side of a ship with a heavy list,

they should be disposed at a considerable angle outwardly, but tlllS causes the boat with its davits, especially at the low side of the ship to moveat a high speed and oscillate violently for some time. This oscillation could beavoided by the provision 0 mechanism adapted to stop the davits in their extreme outboard position, but it will be readily understood that the sudden stop page of a heavy system moving at considerable speed would be likely to'cause oneor other part to break. a v

it has previously been proposed to control the swinging out of davits of the type referred to, by means of tackle connected to a bar which is pivotally connectedto the davit heads, whereby the movements of both synchronous with one another.

The present invention consists in a pair of davits having their axes of rotation inclined outwardly toward the ships side and adapted to rotate outboard by gravity in directionswhich are opposite to each other, and having means for controlling the rotary speed of the davits.

The invention further consists in a pair of davits in which brake members are adapted to engage the davits or elements rigidly secured thereto.

it is not necessary tor the controlling means to engage the davits directly since they might engage a member flexibly coupled with the davits, for instance, the boat. It is preferred, however, to employ a brake member engaging the davit itself, or a part rigidly secured thereto, said member being adapted to eXert a pressure on the davit or on a part immovably secured thereto, the

v Specification of Letters Patent. Application file d June 27., 1920; Serial No. 390,603.

pressure being adjustable -means of a screw and handwheeh Reterrmg now to the accompanying Patented Feb. 22, 1921.

, for instance, by

drawings which illustrate two embodiments of the invention,

Figure liis an elevation of an ,auto- 'i'natic 'davit l rotatably mounted in a frame 2 secured to'the deck of a ship, As clearly shown, the axis ot'rotation of the davit is inclined at a considerable angle from the vertical outwardlyj The means for controlling the rotation of the davit comprise a brake band 3 which is passed around the davit and the action of which may be regulated by means of a screw 4 provided wlth a hand wheel 5. a r I Fig. 2 is a sectional view on the line AB in Fig. 1, and drawn to a somewhat larger scale. It will be understood that it isipreferred to employ a brake collar or drum rigidly secured to the davit. i i "Fig. 3 is a vertical longitudinal section showing the upper portion of atrame 6 of an automatic davit 1, and,

Fig; 4c is a cross-sectional view on the line 0-1) in Fig. 3. The controlling means here comprise two brake shoes 7 and 8 in. engagement with the davit and adapted to be forced against it with any desired pressure by means of a screw?) provided with a han'd'wheel 10, cover plates 11 "and 12 serving' to prevent dust and-1 water from interferingrwith the. proper operation of the mechanism.

By suitable adjustment of the braking ditions, even when the axes of rotation of the davits, owing to an abnormal position of the ship, make a very great angle with the vertical. If desired the davits may be locked at any position in either their outward or inward movement and thus. prevented from swinging back and forth, simply by increasing the braking pressure.

p The davits are preferably used in conjunction with collapsible chocks such as are described in the specification of my co-pending patent application No. 388,528, but any suitable kind of chocks may be used.

It will be understood that the invention is not limited to davits for use on ships, butthat it may also be embodied in davits mounted, for instance, on a pier, a wharf or other landing stage.

P. F. SCHNEIDER. v PISTON AND VALVE OPERATING. MECHANISM FOR WATER MOTORS. APPLICATION man MAY go. 1918- 1, 369;134 Patented-Feb; 22,1921;

Smvemtoz I 772A :30 Haas- 0:) 

